Scientists say the bees' temperament is to ward off predators. But unsuspecting humans will find them to be aggressive, ...

Swarms of aggressive killer bees are on the move and spreading across the U.S. The Africanized honey bee has been found in 13 states, primarily in the South, but appear to be moving north.

A proposal in the California Legislature would pay for more research to save honey bees, but it could be a tough sell amid a budget deficit.